prerm is in php5-xdebug 2.2.3-2build1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | #!/bin/sh
set -e
# Automatically added by dh_installdeb
dpkg-maintscript-helper mv_conffile /etc/php5/conf.d/xdebug.ini /etc/php5/mods-available/xdebug.ini 2.2.0-1~ -- "$@"
# End automatically added section
# Automatically added by dh_php5
if [ "$1" = "remove" ] || [ "$1" = "deconfigure" ] ; then
    if [ -e /usr/share/php5/php5-maintscript-helper ] ; then
	. /usr/share/php5/php5-maintscript-helper
	
	for conf in xdebug  ; do
	    php5_invoke dismod ALL $conf || exit $?
	done
    fi
fi
# End automatically added section
 |